If the roll forward set has not been rolled forward far enough to be consistent with the database, the undo phase cannot occur.

如果前滚集前滚得不够远，无法与数据库一致，则不会出现撤消阶段。

youdao

Old-time Knesset pundits say that dissolution bills, once they begin to roll forward, create a momentum which eventually leads the two big parties to sit down informally and set an agreed date for an early election.

ECONOMIST: Israel